PCAL9722HNHP

I/o Expanders Overview

The PCAL9722HNHP is a 22-bit general-purpose I/O expander utilizing an SPI interface for remote expansion across microcontroller families. It features ultra-low-voltage translation, supporting direct connection to controllers operating down to 1.1 V while managing port voltages from 1.8 V to 5.5 V. The device operates at up to 5 MHz SCLK and includes Agile I/O capabilities such as programmable drive strength, input latching, and switch debounce. It provides bidirectional voltage-level translation between the SPI bus and Port P, ensuring seamless communication in mixed power supply systems.

I/o Expanders Feature Summary

• Agile I/O functionality with programmable output drive strength and configurable push-pull or open-drain stages
• Bidirectional voltage-level translation enabling operation between 1.1 V SPI interfaces and 1.8 V to 5.5 V ports
• Hardware switch debounce and interrupt edge specification for precise signal handling
• Input latch feature that holds pin states until serviced by the controller

I/o Expanders Applications

• Battery-powered mobile applications interfacing with sensors and keypads
• Mixed power supply systems requiring communication between low-voltage processors and higher-voltage peripherals
• Industrial and IoT devices needing flexible GPIO expansion via SPI

I/o Expanders Procurement Notes

Verify the specific suffix HP against official NXP documentation to confirm package type and temperature range. Ensure compatibility with HVQFN32 requirements if applicable. Confirm AEC-Q100 compliance status for automotive designs. Check ordering information for minimum order quantities and packing methods directly from the manufacturer's datasheet.

I/o Expanders Selection Notes

Select this component when SPI interface is preferred over I2C for GPIO expansion. Consider the 22-bit capacity and Agile I/O features for complex peripheral management. Verify voltage levels match both the host controller (down to 1.1 V) and target peripherals (up to 5.5 V). Evaluate the need for hardware switch debounce and input latching before choosing this part over simpler expanders.

I/o Expanders Part Context

The PCAL9722 belongs to NXP's high-performance GPIO expander family, designed for versatile connectivity. It complements other SPI and I2C expanders by offering unique voltage translation and Agile I/O features. This series supports diverse applications from consumer electronics to industrial automation, providing robust solutions for system interconnection challenges.

I/o Expanders Replacement Considerations

PCAL9714HN offers similar Agile I/O features but with only 14 bits. PCAL9722HN/Q900 is the automotive-grade variant of the standard PCAL9722HN. Verify pinout and register compatibility when substituting within the PCAL97xx family.